Detroit Diesel MBE 4000 Service Manual page 278

2.7 DDEC ELECTRONIC CONTROL UNIT
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5. Rotate the safety latch down to release the engine wiring harness connector and disconnect
it from the DDEC-ECU unit. See Figure 2-20.
1. Engine Wiring Harness
2. Safety latch
Figure 2-20
6. Remove the mounting bolts and rubber spacers holding the DDEC-ECU control unit to the
engine. Then remove the unit.
NOTE:
Do not disassemble the DDEC-ECU control unit. It cannot be serviced.
2.7.2 DDEC Electronic Control Unit Installation
Install the DDEC-ECU Control Unit as follows:
1. Position the spacers, DDEC-ECU control unit, and mounting bolts on the cylinder
block, as removed.
2. Install the DDEC-ECU control unit on the cylinder block. Tighten the mounting bolts
15 N·m (11 lb·ft).
3. Install the fuel heat exchanger on the DDEC-ECU and tighten the mounting bolts 8 N·m
(6 lb·ft).
4. Connect the vehicle wiring harness to the DDEC-ECU. Pull down on the locking unit
to lock it in place.
2-32
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Engine Electrical Connector
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3. Engine Electrical Connector
6SE412 0403 Copyright © 2004 DETROIT DIESEL CORPORATION
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All information subject to change without notice.
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